Glass-polishing machine.



No. 696,455. Patented Apr. l, I902.

W. LAHUDNY.

GLASS PULISHING MACHINE.

(Application filed Nov. 14, 1901.) (No Model.) 3 Sheets-Sheet I.

W/TgVESSES: IJVVENTOR.

THE Noam PEYER$ co. PnoTo-umu, WASHINGTON, o. c.

No. 696,455. Patented Apr. I, 1902.

- W. LAHUDNY.

GLASS POLISHING MACHINE.

(Application filed Nov. 14, 1901.) (No Model.) 3 SheetsSheei 2.

WJTNESSES- [NI 1; NYTOR.

v u I BY W. LAHUDNY.

GLASS POUSHING MACHINE.

(Application filed Nov. 14, 1901.)

Patented Apr. I902.

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ATT IR' W NITED Sterne nrnivr @rmcn WVILLIAM LAHODNY, OF AKRON, OIIIO.

GLASS-POLISHING MACHINE.

SPECIFICATION forming part of Letters Patent No. 696,455, dated April 1,1902.. Application filed November 14, 1901. Serial No. 82,293. (Nomodel.)

To all whom it Hwy concern:

Be it known that LWILLIAM LAHODNY, a citizen of the United States,residing at Akron, in the county of Summit and State of Ohio, haveinvented a certain new and useful Improvement in Glass-PolishingMachines, of which the following is a specification.

My invention has relation to improvements in machines for grinding andpolishing the surface of glass; and the object of In yinvention is toproduce a machine having a revoluble table adapted to be movedhorizontally about a center to sustain the sheet of glass, andpower-driven mechanism to carry interchangeable grinding and polishingwheels, with mechanism to move said grinding and polishing mechanismvertically and horizontally to apply it to the glass plate and to causeit to traverse the plate in any direction and raise it from contacttherewith when the Work is completed.

To the aforesaid objects my invention consists in the peculiar and novelconstruction, arrangement, and combination of parts hereinafterdescribed and then specifically pointed out in the claims, referencebeing had to the accompanying drawings, which form a part of thisspecification.

In the accompanying drawings, in which similar reference-numeralsindicate like parts in the different figures, Figure 1 is a sideelevation of my said machine; Fig. 2, a plan; Fig. 3, a central verticalsection, and Fig. 4 a section at the line a: :r of Fig. 3.

Referring to these figures, 1 is a vertical metallic post, preferablyhollow, having a broad base for steadiness, above which it is turned atrue cylinder 2 for a portion of its height, and thence tapers to aflanged top 3 for the purpose of detachably securing the uppermechanism. Surrounding the cylindrical portion 2 is a split sleeve 4,adapted to be tightened by bolts and having from one side an integralhorizontal arm 5, terminating in a short vertical cylindrical sleeve 6,in which is fitted to revolve a vertical axle of a horizontal circularplate or table 7. This table has an outer rim, within which is a woodhoop 8 for holding tacks to retain the blanket, inside of. which hoop isa body 9, of cement, smoothly finished on top, and on which the plate10, of glass, rests above the blanket.

On one side of the sleeve4. is an offset portion 11, forming the case ofa vertical channel, in which is placed a vertical rack 12, curved on itsinner face to conform to the part 2, and in the portion 11 is journaleda short shaft 13, that bears a pinion that meshes in the rack 12, and aratchet-wheel 14, adapted to be retained by a pawl 15, by which thesleeve and table maybe elevated and retained at any desired height.

. Secured to the flange 3 is a similar flange 16, from which rises acylindrical top 17, on which is fitted to revolve a sleeve 18, from oneside of which projects a horizontal arm 19, having raised sides withoutwardly-bow eled outer faces, forming a dovetailed guide and anenlarged longitudinal opening through the bottom for the passage ofmachinery, to be described. Fitted to slide on the guide of this arm isa carriage 20, bearing at one side a nut 21, in which runs a screw 22,revolubly mounted at its ends in bearing 23 24, and driven by ahand-wheel 25.

From the lower part of the carriage 20 is a hollow cylinder 26, on whichis mounted a sleeve 27, from the opposite sides of which project anddepend arms 28. Journaled in the bottom of the carriage 20 and thebottom of the cylinder 26 is a vertical shaft 29, hav ing at the top abevel-gear 30, splined there on, and at the bottom a bevel-gear 31, thatmeshes in a bevel-gear 32 on a shaft 33, journaled in the arms 28. Theshaft 33 bears a pinion 34, that meshes in a pinion or idler 35, thatmeshes in a gear 36 on the grindingwheel shaft 37. This shaft 37 isjournaled in boxes on the lower ends of the arms 28 and has the centralpart screw-threaded and provided with the usual clamping-nuts, by whichthe grinding-wheel 38 is detachably secured thereon.

Motion is imparted to the grinding-wheel in the following manner: In thepost 1 is j our naled a shaft 39, with one end extending out side of thepost and supported in a bracket 40 and bearing fast and loose pulleys 114:2. This shaft bears a bevel-gear 43, that meshes in a bevel-gear 14 onthe lower end of a shaft 15, journaled in the top of the post 1. and across-bar 46, and has a fixed collar that rests on the cross-bar 4G andsustains it against descent. The upper end of the shaft 4513mm 7 car 47,that meshes in a bevel-gear e end of a horizontal shaft 49, jour 1nbearings 50 51 on the arm 19. This it bears an intermediate bevel-gear52, rat meshes in the gear 30, and thus drives the grinding'andpolishing wheel.

The grinding mechanism is arranged to be slightly raised and forceddownward by the following devices: On the shaft 29 is a loose collar 53,retained between two fixed collars 54: 55, and from opposite sidesproject pins 56, that enter openings in opposite arms of a forked lever57, pivoted at one end in brackets 58, depending from the carriage 20and having at its outer end asuitable handle, by which it may bemanipulated.

The grinding mechanism may be revolved on the cylinder 26 by thefollowing mechanism: On top of and integral with the sleeve 27 is aspur-gear 59, that meshes in a pinion on the bottom of a shaft 61,journaled in the bottom of the carriage 20, and a bracket 62, extendingfrom one side of the depending cylinder 26. The pinion 60 is madeespecially long to prevent escaping from the gear 59 as the grindingmechanism is moved vertically. On the shaft 29 within the arm 19 is apinion 63, that meshes in a gear 64 on the shaft 61, and on the hub ofthis gear is the lower member 65 of a toothed clutch. The upper member66 of this clutch is keyed to slide on this shaft 61 and raised andlowered by a lever 67, pivoted at one end to a bracket of the arm 5.

In operation a blanket is placed on the cement cover 9 of the plate 7and secured by being tacked to the Wood hoop 8. This is readily done byswinging the table 7 around from under the grinding machinery. A sheetof glass 10 is then placed on the blanket and the table swung aroundunder the grinding machinery. At first a grinding-wheel 38 is mounted onthe shaft 37 and motion communicated to it from the pulley 41 throughthe machinery hereinbefore described. This wheel is preferably of copperand used in connection with emery to cut away the higher portions of theplate or to cut out scratches. The plate of glass is then submitted tothe action of the wheel by swinging the arm 19 around on the post 1, aswell as revolving the table on the cylinder 6, and also reciprocatingthe carriage 20 along the arm 19 by means of the screw 22. In thisoperation the vertical plane of the wheel 38 can be changed at will bythrowing the clutch member 66 into the member 65 by means of the lever67.

When by the foregoing process the face of the plate has been ground toan even plane and all scratches and uneven places removed, the wheel 38is removed and replaced with polishing-wheels of felt applied in thesame manner in connection with a finer grit.

The oftice of the rack 12 and the shaft 13, with its ratchet and pinionand the pawl 15, is to adapt the height of the table 7 to the thicknessof the glass and the diameter of the grinding and polishing wheels.

The lever57 is employed to increase or diminish the pressure of thegrinding and polishing wheels on the plate of glass and to raise them inintroducing it under them and removing it when polished.

Having thus described my invention, what I claim, and desire to secureby Letters Iatent, is-

1. In a glass grinding and polishing machine the combination of asupporting verti cal post, with a revoluble horizontal arm supportedthereon, with means for moving and retaining said arm at differentheights, and a revoluble table supported at the free end of said arm,and a horizontal arm revolubly supported on the top of said post bearinga carriage longitudinally movable thereon, with grinding mechanismsupported in said carriage arranged to engage a plate of glass on saidtable, with mechanism for driving said grinding mechanism, andfor movingsaid carriage along said arm, substantially as shown and described.

2. In a glass-polishing machine having a supporting vertical post,with arevoluble horizontal arm supported thereon with means for moving andretaining it at different heights thereon, and a horizontal tablerevolubly mounted in the outer end of said arm, ahorizonta] armrevolubly mounted on the top of said post bearing a carriage adapted tobe reciprocated lengthwise thereof, with grinding mechanism mounted onsaid carriage adapted to engage a plate of glass on said table, andrevoluble on said carriage, with mechanism adapted to drive saidgrinding mechanism, and a clutch arranged to engage said drivingmechanism to revolve said grinding mechanism and means for throwing saidclutch into and out of engagement,substantially as shown and described.I

3. In a glass grinding and polishing machine the combination with asupporting-post of a horizontal arm revolubly mounted thereon andmechanism for raising, lowering and arresting said arm thereon, ahorizontal table revolubly mounted in the free end of said arm to holdthe glass, a horizontal arm mounted on the top of said post havingsliding ways with a carriage mounted thereon, and means for moving saidcarriage lengthwise thereof, a frame horizontally revoluble on saidcarriage adapted to bear grinding and polishing machinery, and means formoving said frame vertically on said carriage, with driving mechanismmounted in said post and connected by intermediate mechanism to drivesaid grinding and polishing mechanism and means as a lever to regulatethe pressure of said grinding and polishing mechanism with reference toa plate of glass on said table, substantially as shown and described.

4. In a glass grinding and polishing machine, the combination with avertical post, a horizontal arm revoluble thereon provided with meansfor raising and lowering it, a table revolubly mounted on the free endof said arm, a horizontal arm revolubly attached to the top of saidpost, a carriage slidable on said arm, a screw for driving said carriagealong said arm, a frame revolubly supported on and depending from saidcarriage to retain revoluble grinding and polishing mechanism above andadjacent to said table, driv ing mechanism mounted in said postconnected by intermediate machinery with said grinding and polishingmechanism, means for raising and lowering said frame, and a clutch andintermediate mechanism to cause said driving mechanism to rotate saidframe, and means for operating said clutch, substantially as shown anddescribed.

5. An improved table for glass grinding and polishing machinesconsisting of a metallic plate with a raised rim having a band of woodwithin said rim and a bed of cement within said wood rim, said wood andcement having their tops in the same horizontal plane, substantially asshown anddescribed.

In testimony that I claim the above I hereunto set my hand in thepresence of two subscribing witnesses.

WILLIAM LAHODNY.

In presence of-- WM. 0. ROMPE, P. E. WELTON.

